An engine, running at 250 r.p.m., drives a line shaft by means of a belt. The engine pulley is 850 mm diameter and the pulley on the line shaft being 550 mm. A 900 mm diameter pulley on the line shaft drives a 150 mm diameter pulley keyed to a dynamo shaft. Find the speed of the dynamo shaft, when 1. there is no slip, and 2. there is a slip of 3% at each drive.

An engine, running at 250 r.p.m., drives a line shaft by means of a belt. The engine pulley is 850 mm diameter and the pulley on the line shaft being 550 mm. A 900 mm diameter pulley on the line shaft drives a 150 mm diameter pulley keyed to a dynamo shaft. Find the speed of the dynamo shaft, when 1. there is no slip, and 2. there is a slip of 3% at each drive.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Design of Shafts and Shaft Components

The shaft is basically defined as the machine element that rotates, is in circular cross-section, it is majorly used to transfer the power from one part of the system to another, or from a power generating machine to a power absorbing machine. The shaft is supported on bearings and is rotated with the help of a set of gears or pulleys that are used for the power transmission. Bending moment, torsion, and an axial force act upon the shaft. Designing of shaft primarily involves determining stresses at a critical point in the shaft that is arising due to loading.

Question

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An engine, running at 250 r.p.m., drives a line shaft by means of a belt. The
engine pulley is 850 mm diameter and the pulley on the line shaft being 550
mm. A 900 mm diameter pulley on the line shaft drives a 150 mm diameter
pulley keyed to a dynamo shaft. Find the speed of the dynamo shaft, when 1.
there is no slip, and 2. there is a slip of 3% at each drive.

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